Portable kettle-furnace



.L MVURDOCKLv *Porjtable Kettle Fumane.

l Paten-teddu 2Q, y1865.

N. PETERS. Fhuluhqgrapher. wamingwn. ILC,

of a segment of a circle.

PATENT Ntrice.,

.THN MURDCCK, OF SOUTH CARVER, MASSACHUSETTS.

PORTABLE KETTLE-FURNACE.

Specification forming part of Letters Patent No. 48,302, dated June 20, 1865. I

To all 'whom t may concern.-

Be it known that I, JOHN MURDOCK, of South Carver, Plymouth county, in the State of Massachusetts, have invented certain new and useful Improvements in Portable Kettle Furnaces; and l do hereby declare that the following is afull, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specication, in which- Figure lis a front elevation; Fig. 2, a longitudinal vertical section without the cover; Fig. 3, a cross vertical section without the cover, and Figs. 4 and 5 horizontal sections taken at the lines A a and B b of Fig. 2.

The same letters indicate like parts in all the gures.

My said invention relates to improvements on the portable kettle-furnace generally used byfarmers, whereby the flame and other heated products of combustion are caused to act more equally on every part of the kettle than by any other mode of construction before known, and by which the construction is facilitated.

In the accompanyingdrawin gs, a represents a quadrangnlar lire -place of greater length than breadth.l The bottom plate, b, is formed with a slightly sunken hearth. The frontplate, c, is made with an opening of sucient size for the introduction of the fuel, to which is tted a hinged door, d, and the upper end of this plate spreads out in front, as at e, in the form of a segment of a circle, to receive a rin g, to be presently described. The back plate, f, is :dat up to within a short distance ofthe upper edge at g, where it spreads out in the form The two side plates, lt h, are dat, with the exception of an outward swell, i t', at the upper part, which extends to within a short distance of each end. The swell or spread of each is such as to present on the inner upper edge segments of a circle, and to the upper edge of the four plates above described, and constituting the lire-chamber, is fitted a ring, j, the inner edge of which forms a seat for the lower part of the kettle 7c, leaving the bottom of the said kettle exposed to the direct heat of the fire below. The inner periphery of this ring does not continue along over the back partofthe fireplace, an open Hue space, Z, bein g left there, between the back plate terni the u J er rin 7 and its inner edoe extends to and is in contact with the outer surface ot' the kettle when in in place, except at the flue-space p, thus forming the upper boundary of the flue-space m around the kettle. To

the upper edge of this rst cylinder is fitted a' a second or upper cylinder, q, which, when in place, forms a continuation of the rst or lower cylinder. The upper edge of the upper cylinder is formed with an inward-projectingiiange,

r, to form a seat-for the rim s of the kettle.

All the plates are secured a-nd firmly held together by four screw-rods, t t t t, which `extend down from the flange o, or upper ring, and extend down in the four corners of the tireplace and through the bottom plate below, where they are provided with nuts. That portion ot' theange o, or upper ring, which is over the flue-space l in the lower ring is formed with a series of holes controlled bya sliding damper, u, the outer edge of which is formed with rackteeth engaged by the teeth of a circular rack on a handle, @,outside, by the turning of which the damper can be operated to open or close the said apertures, and just above this damper the upper cylinder is formed with au exit-aperture, fw, suitable for receiving a stovepipe.

From the foregoing arrangement it will be seen that the bottom of the kettle, below the bottom ring, is exposed to the direct action of the flame and other vheated products of combustion. The draft passes toward the back and up between the back of the kettle and the back plate of the tire-place, through the flue space t in the bottom ring, j, to the tine-space m, and, if the damper u on the ring o is open, the draft will pass directly to the exit-pipe; but when the damper is closed the draft will pass around both sides of the kettle in the fluespace m to the front part ot' the upper ring, and through the flue p into the upper lueinserted or taken out.

space between the upper ring and the flange on which the rim of thekettle rests, and there the draft will divide and pass each side of the kettle to the exit-pipe behind. By these means the heat will be distributed properly all around the kettle-a result which is not attainable by any arrangement heretofore employed, while at the same time a direct draft can be obtained, when desired, for kindling the fire.

The under side of the bottom plate is cast with projecting tlange-pieees x, forming dovetail grooves, to which are fitted the Lipper ends of legs or stands, so that they can be readily One set are formed as legs, on which the furnace stands when required to be used for any considerable length of time in the sume place, and the other set are provided with truck-wheels, and are to be used when it is desired to move the furnace from place to place.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. Combining with the fire-place, kettle, and surrounding cylinder the two rings, termed the lower 7 and upper 7 rings, to form the two series ot flue-spaces around the kettle, the lower ring having a flue-space through it at one end ot' the tire-place and the upper ring a like line-space above the opposite end of the fire-place, and apertures governed by a damper over the line opening in the lower ring, substantially as and for the purpose specified.

2. Making the cylinder which surrounds the 

